Sleeping bag



FIG. 1 is front view of a sleeping bag.

FIG. 2 is a back view of the sleeping bag.

FIG. 3 is a top view of the sleeping bag.

FIG. 4 is a left view of the sleeping bag.

FIG. 5 is a right view of the sleeping bag; and,

FIG. 6 is a bottom view of the sleeping bag. 

CLAIM The ornamental design for a sleeping bag, as shown and described. 